AnyBus IO modules design guide.rev1.22
.pdf
®
DESIGN GUIDE
ANYBUS® I/O MODULES
Doc. No. ABIO-DG-1.22
HMS Fieldbus Systems AB |
HMS FIELDBUS SYSTEMS AB |
Phone: |
+46 - 35 - 172900 |
Pilefeltsgatan 93-95 |
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FAX: |
+46 - 35 - 172909 |
S-302 50 Halmstad |
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e-mail: |
info@hms.se |
SWEDEN |
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e-mail: |
support@hms |
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www: |
www.hms.se |
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Design Guide |
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Revision 1.22 |
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2000-03-16 |
1 Introduction ................................................................................................................................................................... |
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1.1 |
Terminology............................................................................................................................................................ |
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1.2 Background ............................................................................................................................................................. |
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1.3 |
Conditions for Trademark Use............................................................................................................................. |
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1.4 |
Description of the ANYBUS concept................................................................................................................... |
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1.4.1 Description of the ANYBUS I/O Modules .................................................................................................. |
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2 Module Interface ........................................................................................................................................................... |
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2.1 |
Power Connector.................................................................................................................................................... |
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2.1.1 Connector Pin Description ............................................................................................................................. |
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2.1.2 Examples of Hardware Design...................................................................................................................... |
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2.2 |
I/O Pin Connectors.............................................................................................................................................. |
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2.2.1 Connector Pin Description ........................................................................................................................... |
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2.2.2 Examples of Hardware Design.................................................................................................................... |
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2.3 Power and I/O Connectors................................................................................................................................. |
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2.4 |
Fieldbus Interface ................................................................................................................................................. |
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2.4.1 Fieldbus Connectors...................................................................................................................................... |
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3 Electrical Specification................................................................................................................................................ |
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3.1 |
Power Supply Connector .................................................................................................................................... |
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3.1.2 BUS Electronics Electrical Characteristics (pin 1, GNDBUS pin 2) ........................................................ |
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3.1.3 LED Outputs Electrical Characteristics (pin 7-10) .................................................................................... |
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3.1.4 Configuration Inputs Electrical Characteristics (pin 11-19)..................................................................... |
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3.1.5 Control Signals Electrical Characteristics (pin 20) .................................................................................... |
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3.2.1 Digital Output Signals Electrical Characteristics (pin 1-16, alt 1-32)...................................................... |
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3.3 |
Output Connector ................................................................................................................................................ |
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3.3.1 Digital Input Signals Electrical Characteristics (pin 1-16, alt 1-32)......................................................... |
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4 The ANYBUS I/O Modules....................................................................................................................................... |
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4.1 |
Module Description ............................................................................................................................................. |
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4.2 |
Functional Description ........................................................................................................................................ |
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4.3 |
Operation............................................................................................................................................................... |
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4.4 |
Fieldbus Error ....................................................................................................................................................... |
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5 Mechanical Design Specification............................................................................................................................... |
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5.1 |
Mechanical Layout of the PCB ........................................................................................................................... |
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5.1.1 32 I/O Module............................................................................................................................................... |
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5.1.2 64 I/O Module............................................................................................................................................... |
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5.2 |
Fieldbus Interface Specific Area......................................................................................................................... |
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5.2.1 32 I/O Module............................................................................................................................................... |
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5.2.2 64 I/O Module............................................................................................................................................... |
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5.2.3 Component Placement.................................................................................................................................. |
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5.3 |
Product Interface and Electronics Area............................................................................................................. |
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HMS FIELDBUS SYSTEMS AB |
Page 2 (2) |
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Design Guide |
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Revision 1.22 |
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2000 -03-16 |
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5.3.1 32 |
I/O Module |
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5.3.2 64 |
I/O module ............................................................................................................................................... |
21 |
HMS FIELDBUS SYSTEMS AB |
Page 3 (3) |
Design Guide
Revision 1.22
2000-03-16
Preface
The data and illustrations found in this design guide are not binding. We reserve the right to modify our products in line with our policy of continuous product development. The information in this design guide is subject to change without notice and should not be considered as a commitment by HMS Fieldbus Systems AB.
HMS Fieldbus Systems AB assumes no responsibility for any errors that may appear in this design guide.
ANYBUS® is a registered trademark of HMS FieldBus Systems AB. All other registermarks are the property of their respective holders.
HMS FIELDBUS SYSTEMS AB |
Page 4 (4) |
Design Guide
Revision 1.22
2000-03-16
1 Introduction
This Design Guide is intended to provide details necessary to implement the ANYBUS in a product.
The ANYBUS modules constitute the HMS Fieldbus Systems AB’s adaptable system which follows the official standard for each fieldbus interface.
1.1 Terminology
Throughout this document the term "manufacturer" refers to the person or persons who are developing a fieldbus product. The end-user of the product is referred to as the "customer".
As in all communication systems the terms "read" and "write" can be ambiguous, since their meaning depend on which end of the link is being referenced. The convention in this document is that "read" and "write" are always being referenced to the master end of the link.
1.2 Background
The development and increased use of intelligent field devices in the 1980s led to the need to replace the 4- 20mA current loop standard with an open, vendor-independent, multidrop, bi-directional digital communication system, commonly known as fieldbus. There was also a growing requirement to integrate the various microprocessor-based intelligent field devices so that users could take full advantage of a field network. The fieldbus is a digital communication link between control systems and attached digital devices. It has emerged to revolutionise the control environment and device characteristics in both process and manufacturing industries.
Fieldbus protocols are based on ISO Reference Model for Open System Interconnection (OSI-RM), ISO 7498. However, fieldbuses only use layers 1, 2, 7 of OSI-RM, layer 3 through 6 are bypassed for real-time purpose. There is also a new User Layer added on top of the Application Layer, where distributed control strategy is implemented and which makes the fieldbus much more than a communication network.
There is a wide variety of competing bus systems on the market, which mainly focus on part of the overall system. These facts makes it difficult for both the user and the customer to choose which fieldbus they should use. The solution is the ANYBUS concept. The ANYBUS modules make it possible for the manufacturer to provide any fieldbus system to their products, that is supported by the ANYBUS.
1.3 Conditions for Trademark Use
Please see document no. ABTM-01.
1.4 Description of the ANYBUS Concept
The ANYBUS modules are designed to fit into applications with different complexity levels. There are three different types of ANYBUS modules depending on the amount of data that has to be handled. There will be an ANYBUS for any fieldbus system and the customer does not have to consider any fieldbus specific information, fieldbus dependent settings or in-stallations for the design of an ANYBUS module into a product.
HMS FIELDBUS SYSTEMS AB |
Page 5 (5) |
Design Guide
Revision 1.22
2000-03-16
1.4.1 Description of the ANYBUS I/O Modules
The ANYBUS I/O modules for 32 (64) I/O can handle 16 (32) input signals and 16 (32) out-put signals. The input and output signals are transferred over a fieldbus system.
The application side (the product connected to the ANYBUS module) can connect directly to each I/O signal via a standard connector. These connectors are always compatible with all ANYBUS modules in the 32 and 64 I/O family.
HMS FIELDBUS SYSTEMS AB |
Page 6 (6) |
Design Guide
Revision 1.22
2000-03-16
2 Module Interface
This section only specifies the module interface, other parts of the hardware are not men-tioned though they are fieldbus dependent parts. These parts differ from one supported bus to another. The interface to the application is made up of these connectors:
Application connector
•power supply connector
•input pin connector (output from application)
•output pin connector (input to application) Fieldbus connector
Figure 2.1: ANYBUS 64 I/O |
2.1 Power Connector
Through this connector the ANYBUS module receives power supply and some external configurations are possible to make. The function for this connector varies some for the different ANYBUS modules. For exact description of the application interface see the Appendix for each fieldbus.
2.1.1 Connector Pin Description
The power supply connector is a male strip connector placed on the circuit board according section 5.3. The pins in the connector have the following functions.
Pin |
Description |
1 |
+5V BUS |
2 |
GND BUS |
3 |
Not connected. Isolation distance |
4 |
Not connected. Isolation distance |
5 |
+5V electronics |
6 |
GND electronics |
7 |
indication LED output. FB status (open collector) |
8 |
indication LED output. FB status (open collector) |
9 |
indication LED output. FB ERROR (open collector) |
10 |
indication LED output. Power electronics |
11 - 19 |
Configuration input 1 - 9 |
20 |
RESET |
Table 1: Connector pin description
HMS FIELDBUS SYSTEMS AB |
Page 7 (7) |
Design Guide
Revision 1.22
2000-03-16
See section 4 for electrical specification of the signals, and Appendix for each fieldbus for the function of the LED indication outputs.
2.1.2 Examples of Hardware Design
Dual-Galvanic Isolated:
The dual power supply build on the DC/DC Brandner DH5W2-41. This circuit has both overload and overtemperature protection. Maximum current for each output is 150 mA. This dual power supply is recommended by HMS.
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L 1 |
3 |
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+ 5 V _ B U S |
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EMI |
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+ |
C 3 |
+ 2 4 V |
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DC |
C 2 |
1 0 0 u F |
IN |
+ |
1 0 0 n F |
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C 1 |
D 1 |
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G N D _ B U S |
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1 0 u F |
S M B J 2 4 A |
+ |
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D 0 |
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OUT2 |
L 2 |
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DC |
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1 |
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EMI |
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2 4 V _ G n d |
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DH5W2-41 |
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1 N 5 8 1 9 |
BRANDNER |
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C 4 |
+ C 5 |
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1 0 0 u F |
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1 0 0 n F |
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Figure 2.2: Dual-Galvanic-Isolated Power supply
Ref |
Component |
Note |
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C1 |
capacitor |
ceramic |
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10u/50V |
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C2, C4 |
capacitor |
ceramic |
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100n/25V |
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C3, C5 |
capacitor |
electrolyte |
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100u/16V |
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D0 |
diode 1N5819 |
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D1 |
diode SMBJ24A |
transient protection |
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L1, L2 |
EMI filter |
NFM61R30T472 |
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DC/DC |
DC/DC |
DH5W2-41 |
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Table 2: Component list for dual-galvanic-isolated power supply
Single-Galvanic Isolated (+5V Bus):
This single power supply is galvanically isolated and built on the DC/DC TRACO TEM2 2411. The circuit has both overload and over-temperature protection. Maximum current is 400mA. This power supply is recommended by HMS.
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L 1 |
3 |
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1 |
+ 5 V _ B U S |
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+ 2 4 V |
+ |
DC |
E M I |
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IN |
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+ |
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C 1 |
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+ C 3 |
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D 1 |
C 2 |
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1 0 u F |
S M B J 2 4 A |
1 0 0 u F |
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1 0 0 n F |
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D 0 |
DC |
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1 |
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2 4 V _ G n d |
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TEM2 2411 |
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G N D _ B U S |
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TRACO |
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1 N 5 8 1 9 |
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Figure 2.3: Single-Galvanic Isolated Power supply |
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HMS FIELDBUS SYSTEMS AB |
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Page 8 (8) |
Design Guide
Revision 1.22
2000-03-16
Ref |
Component |
Note |
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C1 |
capacitor 10u/50V |
ceramic |
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C2 |
capacitor 100n/25V |
ceramic |
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C3 |
capacitor 100u/16V |
electrolyte |
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D0 |
diode 1N5819 |
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D1 |
diode SMBJ24A |
Transient |
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protection |
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L1 |
NFM61R30T472 |
EMI-filter |
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DC/DC |
DC/DC |
TRACO TEM2 |
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2411 |
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Table 3: Component list for single-galvanic-isolated power supply
Single-Not Galvanic Isolated (Vcc electronic):
This single power supply build on the step down regulator Motorola MC34063AD. The circuit has an overload protection, maximum current is 350 mA. This power supply is recommended by HMS. The power supply must be used in conjunction with the Single-Galvanic Power Supply for the +5V Bus/GNG Bus.
U3
+24V |
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1 |
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8 |
DRIVE IN |
SWITCH IN |
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Vcc |
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L1 |
R19 |
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L3 |
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L2 |
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I SENS |
SWITCH OUT |
2 |
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10uH |
0.33R |
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VCC IN |
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3 |
D3 |
100uH |
+ C27 |
10uH |
+ C28 |
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C22 |
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SS14 |
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220uF |
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47uF |
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+ C26 |
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100nF |
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5 SENS IN |
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100uF |
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GND 4 |
C30 |
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Vcc |
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470pF |
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R21 |
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MC34063AD |
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3k |
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R20 |
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1k |
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Figure 2.4: Single-Not-Galvanic Isolated Power supply
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Component |
Note |
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C22 |
capacitor 100n/25V |
ceramic |
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C26 |
capacitor 100u/50V |
electrolyte |
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C27 |
capacitor 220u/16V |
electrolyte |
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C28 |
capacitor 47u/10V |
electrolyte |
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C30 |
capacitor 470p/25V |
ceramic |
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D3 |
diode SS14 1A |
schottky |
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R19 |
resistor 33ohm |
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R20 |
resistor 1000ohm |
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R21 |
resistor 3000ohm |
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L1, L2 |
filter inductor 10uH |
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L3 |
switch inductor 100uH |
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U3 |
step down reg. |
MC34063AD |
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Table 4: Component list for single-not-galvanic-isolated power supply |
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HMS FIELDBUS SYSTEMS AB |
Page 9 (9) |
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Design Guide
Revision 1.22
2000-03-16
2.2 I/O Pin Connectors
These two connectors are the direct contact to the carrier board, one connector for the input and one for the output. Each pin from the connectors is one specified input or output signal dependent on which connector it is. The digital input and output connector should be male strip connectors placed on the circuit board of the ANYBUS module. See picture 2 for placing of the contacts.
2.2.1 Connector Pin Description
The pins in the input connector have the following functions.
Pin |
Description |
1 - 16 |
Digital input signals |
17 - 32 |
Digital input signals (only 64 I/O module) |
The pins in the output connector have the following functions.
Pin |
Description |
1 - 16 |
Digital output signals |
17 - 32 |
Digital output signals (only 64 I/O module) |
See section 3 for electrical specification of the signals.
2.2.2 Examples of Hardware Design
Linear IN:
This connection is recommended by HMS for the translation from 24V to 5V on the input of the ANYBUS module. The 74HC14 is used to shape the signal after the low pass filter.
R 1 |
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R 2 |
U 1 A |
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U 2 A |
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In +24V |
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3 |
2 |
3 |
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2 |
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I n _ A B |
7k15 |
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7k15 |
7 4 H C 1 4 |
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7 4 H C 1 4 |
ANYBUS |
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R 3 |
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10n |
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3k1 |
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Low Pass |
C 1 |
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Filter |
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Linear OUT:
This connection is recommended by HMS for the translation from 5V to 24V on the output of the ANYBUS module.
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1 0 k |
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O u t _ A B |
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R 1 |
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Q 1 |
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N P N |
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2 k 7 |
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Transient |
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C 1 |
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protection |
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ANYBUS |
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1 0 n |
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Diode |
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+ 2 4 V |
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Q 2 |
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P N P |
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O u t |
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2 |
D 1 |
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C 2 |
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1 N 4 0 0 4 |
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1 |
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1 0 0 n |
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HMS FIELDBUS SYSTEMS AB |
Page 10 (10) |